WP_Filesystem_FTPext::connect()

	public function connect() {
		if ( isset($this->options['ssl']) && $this->options['ssl'] && function_exists('ftp_ssl_connect') )
			$this->link = @ftp_ssl_connect($this->options['hostname'], $this->options['port'], FS_CONNECT_TIMEOUT);
		else
			$this->link = @ftp_connect($this->options['hostname'], $this->options['port'], FS_CONNECT_TIMEOUT);

		if ( ! $this->link ) {
			$this->errors->add( 'connect',
				/* translators: %s: hostname:port */
				sprintf( __( 'Failed to connect to FTP Server %s' ),
					$this->options['hostname'] . ':' . $this->options['port']
				)
			);
			return false;
		}

		if ( ! @ftp_login( $this->link,$this->options['username'], $this->options['password'] ) ) {
			$this->errors->add( 'auth',
				/* translators: %s: username */
				sprintf( __( 'Username/Password incorrect for %s' ),
					$this->options['username']
				)
			);
			return false;
		}

		// Set the Connection to use Passive FTP
		@ftp_pasv( $this->link, true );
		if ( @ftp_get_option($this->link, FTP_TIMEOUT_SEC) < FS_TIMEOUT )
			@ftp_set_option($this->link, FTP_TIMEOUT_SEC, FS_TIMEOUT);

		return true;
	}